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Air-permeable masterbatch and fabrication method of air-permeable film with masterbatch

A technology of breathable masterbatch and breathable film, which is applied in the field of breathable masterbatch, can solve the problems of particle shedding of inorganic fillers, low controllability of micropore size, and high product defect rate, and achieves increased performance controllability and reduced tension. The effect of stretching process and reducing product defect rate

Active Publication Date: 2013-04-10
MALION NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The common production method of breathable film is to add a certain proportion of calcium carbonate, talcum powder and other inorganic fillers to the polymer, extrude it into a sheet / film through a screw, and then stretch it horizontally and vertically. , when the bonding force between the inorganic filler and its surrounding polymer is less than the deformation force of the polymer caused by stretching, the polymer will separate along the edge of the inorganic filler particle, resulting in micropores, the size and shape of which are the same as those of the inorganic filler The particle size, shape and stretching method, stretching ratio and other process conditions are related. There are many influencing parameters, the probability of error is high, the controllability of the micropore size is low, and the defective rate of the produced products is high, which increases the production capacity. Moreover, after long-term use, due to the aging of the film, the bonding force between the particle edge of the inorganic filler and the polymer becomes smaller, which will cause the particles of the inorganic filler to fall off, thereby affecting the water-proof effect

Method used

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  • Air-permeable masterbatch and fabrication method of air-permeable film with masterbatch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Polyethylene 95%;

[0026] Ethylene glycol 5%;

[0027] Put polyethylene and ethylene glycol into the internal mixer and knead according to the above ratio. The temperature of the internal mixer is 150°C. After internal mixing for 5 minutes, the breathable masterbatch is obtained by extruding and granulating with a twin-screw extruder. The extruder The rotation speed is 30 rpm, and the temperature is 130°C, 140°C, 150°C, 150°C, 155°C, 160°C. Cast the prepared breathable masterbatch into a film, the temperature of the barrel of the casting machine is 250°C, the temperature of the die head is 260°C, and the linear speed of the casting machine is 85m / min, and the obtained cast film is cooled and finalized. roll. Pull the rolled cast film into a steam hot water tank for 2 minutes to dissolve the water-soluble organic matter in the film, and dry and roll the prepared water-proof and breathable film.

Embodiment 2

[0029] Polypropylene 95%;

[0030] Lactic acid 5%;

[0031] Put polypropylene and lactic acid into the internal mixer and knead according to the above ratio. The temperature of the internal mixer is 180°C. After internal mixing for 10 minutes, the air-permeable masterbatch is obtained by extruding and granulating with a twin-screw extruder. The extruder speed is 50 revolutions / minute, the temperature is 150°C, 160°C, 170°C, 165°C, 175°C, 180°C. The prepared breathable masterbatch is cast into a film, the barrel temperature of the cast machine is 260°C, the die head temperature is 280°C, and the linear speed of the cast machine is 95m / min, the cast film is cooled and finalized roll. The rolled cast film is pulled into a steam hot water tank for 5 minutes to dissolve the water-soluble organic matter in the film, and the prepared water-proof and breathable film is dried and rolled. Example 3

Embodiment 3

[0032] Polyethylene 90%;

[0033] Glycerol 10%;

[0034] Put polyethylene and glycerol into the internal mixer and knead according to the above ratio. The temperature of the internal mixer is 160°C. After 8 minutes of internal mixing, use a twin-screw extruder to extrude and granulate to obtain a breathable masterbatch. The extruder speed 40 rpm, temperature 130°C, 140°C, 150°C, 155°C, 160°C, 160°C. Cast the prepared breathable masterbatch into a film, the barrel temperature of the casting machine is 250°C, the die head temperature is 260°C, and the linear speed of the casting machine is 90m / min, and the obtained cast film is cooled and finalized. roll. The rolled cast film is pulled into a steam hot water tank for 3 minutes to dissolve the water-soluble organic matter in the film, and the prepared water-proof and breathable film is dried and rolled.

[0035] The properties of the water-proof and breathable membranes prepared in the above three examples are shown in the tab...

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Abstract

The invention discloses an air-permeable masterbatch which comprises the following components: 90-95% of polyolefine and 5-10% of water soluble organic matter, wherein polyolefine is polyethylene or polypropylene; and the water soluble organic matter is ethylene glycol, glycerol or lactic acid. The invention further discloses a method of fabricating a water-proof air-permeable film with the air-permeable masterbatch. With the adoption of the method, parameters influencing an air-permeable effect of the water-proof air-permeable film can be greatly reduced; a drawing process is reduced; the controllability of properties such as the air permeability of the film is improved; the defective rate of a product is reduced; the quality of the product is improved; the generated waste product is reduced; the production cost is saved; a problem of an edge binding force between an inorganic filler particle and a polymer does not exist; and the service life of the product is prolonged.

Description

[0001] technical field [0002] The invention relates to a breathable master batch, in particular to a method for manufacturing a water-proof and breathable membrane by using the breathable master batch. Background technique [0003] Breathable film is a film with tens of thousands of micropores (pore size ranging from a few tenths of a micron to tens of microns) made of polymer materials through a specific production process. It is characterized by breathability and impermeability. It allows water Gases such as steam and air pass through, but liquids are not allowed to pass through. At present, breathable films have been widely used in personal hygiene products such as baby diapers, medical clothing, medical gauze, breathable rainproof cloth, raincoats, food packaging, crop preservation, building waterproofing and other fields. [0004] The common production method of breathable film is to add a certain proportion of calcium carbonate, talcum powder and other inorganic fil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/12C08K5/053C08K5/09C08J5/18C08J9/28C08J9/26
CPCC08K5/09C08L23/12C08K5/053C08L23/06C08J5/18C08J3/22C08J2323/06C08J2323/12C08L23/02
Inventor 陈贤裕张朝益张朝凯佘维深
Owner MALION NEW MATERIALS CO LTD
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